2. impairment of cognitive functions:
inattentiveness, lack of concentration and capacity of sustained mental
activity, and inability to maintain serial relationships of events and to shift
from one mental activity to another = impersistence in all assigned tasks and
perseveration

Evaluation tests:
card sorting test, proverb interpretation, sequencing of pictures and three-step
posture test. The latter is a famous bedside test: slap palm, followed by
hitting with fist then strike with back of hand. Patients with frontal
disorders do it in incorrect sequence, often perseverate, or make unwanted
gestures,…

8. bilateral ideomotor apraxia, or
the inability to execute learned motor skills on command or by imitation. In the
parietal variety, the ability to comprehend gestures as well as to pantomime to
verbal command is lost (light a match or…); whereas in the frontal variety,
gesture comprehension is normal.

Ideational apraxia is when the entire
concept of an action is lost and the subject can not even attempt it. This can
be tested by having subjects perform sequential tasks like having them turn on a
flashlight after given two batteries and an empty flashlight.